AS3561 206.31.24.0/21 CIDR and IP Range Summary.ASN: 3561 - CenturyLink Communications LLCHost Count: 2046Addressable IPs: 2048206.31.24.0/24206.31.25.0/24206.31.26.0/24206.31.27.0/24206.31.28.0/24206.31.29.0/24206.31.30.0/24206.31.31.0/24